scholarly journals The influence of inclusion of either an antibiotic or a probiotic in the diet on the development of digestive enzyme activity in the pig

1990 ◽  
Vol 64 (1) ◽  
pp. 59-70 ◽  
Author(s):  
G. K. Collington ◽  
D. S. Parker ◽  
D. G. Armstrong
Keyword(s):  
Enzyme Activity ◽  
Small Intestine ◽  
Treatment Group ◽  
Present Experiment ◽  
Digestive Enzyme ◽  
Digestive Enzyme Activity ◽  
Growth Promoter ◽  
Peptidase Activity ◽  
Creep Feed

The aim of the present experiment was to determine the influence of either probiotic or antibiotic inclusion in the diets of pigs from birth on the development of enzyme activity in the small intestine. Pigs were fed on creep feed and grower diets containing either a probiotic, an antibiotic or no added growth promoter. At 7, 17, 42 and 80 d of age pigs from each treatment group were sampled to investigate the development of carbohydrase and peptidase activity in the mucosa at five sites along the small intestine. Inclusion of either the probiotic or antibiotic had a significant effect on the development of sucrase (sucrose α-D-glucohydrolase;EC3.2.1.48), lactase (β-D-galactoside galactohydrolase;EC3.2.1.23) and tripeptidase (EC3.4.11.4) activities before weaning but had no effect on depeptidase (EC3.14.13.11) activity. The study of the distribution of enzyme activity along the small intestine showed significant differences between the proximal and distal sections associated with weaning.

scholarly journals Effect of Bacillus megaterium-Coated Diets on the Growth, Digestive Enzyme Activity, and Intestinal Microbial Diversity of Songpu Mirror Carp Cyprinus specularis Songpu

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Liang Luo ◽  
Qiyou Xu ◽  
Wei Xu ◽  
Jinnan Li ◽  
Chang’an Wang ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Treatment Group ◽  
Microbial Diversity ◽  
Bacillus Megaterium ◽  
Intestinal Microflora ◽  
Digestive Enzyme ◽  
Fish Growth ◽  
Digestive Enzyme Activity ◽  
Control Group ◽  
Mirror Carp

The present study was conducted to evaluate the effect of a Bacillus megaterium-coated diet on growth performance, digestive enzymes, and intestinal microbial diversity in Songpu mirror carp (Cyprinus specularis Songpu). The fish were manually fed two diets (a control diet and a B. megaterium-coated diet) three times daily until apparent satiation for 56 days. Compared with the control group, supplementation with the B. megaterium-coated diet enhanced the fish growth and significantly reduced the feed conversion ratio ( P < 0.05 ). The activities of foregut amylase and lipase in the treatment group were significantly higher than those in the control group ( P < 0.05 ). The activities of foregut, midgut, and hindgut proteases in the treatment group were all higher than those in the control group ( P > 0.05 ). The results of sequencing the 16S rDNA genes of the microbiota through high-throughput sequencing showed that the diversity and abundance of the intestinal microflora increased along with Songpu mirror carp growth. The Songpu mirror carp fed a diet coated with B. megaterium displayed increased proportions of intestinal Bacillus and Lactococcus at the genus level, and both were significantly higher than those of the control group ( P < 0.05 ). These results therefore suggest that dietary B. megaterium application can improve the growth and digestive enzyme activity of Songpu mirror carp and enrich the beneficial genus composition of its main intestinal microflora.

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